def sequentialsearch(a_list, item):
    found = False
    for i in a_list:
        if i == item:
            found = True
            break

    return found


if __name__ == '__main__':
    a_list = [1, 11, 23, 1, 6, 5, 44]
    print(sequentialsearch(a_list, 11))
    print(sequentialsearch(a_list, 12))